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<li class="level1"><a href="#public-functions">公用函数</a></li>
<li class="level1"><a href="#static-public-members">静态公用成员</a></li>
<li class="level1"><a href="#details">详细信息</a></li>
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<h1 class="title">QQuickTextureFactory 类</h1>
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<p>The <a href="qquicktexturefactory.html">QQuickTextureFactory</a> class provides an interface for loading custom textures from QML. <a href="#details">更多...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign">头文件：</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QQuickTextureFactory&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += quick</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 5.0</td></tr><tr><td class="memItemLeft rightAlign topAlign">继承自：</td><td class="memItemRight bottomAlign"> <a href="../qtcore/qobject.html">QObject</a></td></tr></table></div><ul>
<li><a href="qquicktexturefactory-members.html">所有成员的列表，包括继承成员</a></li>
<li><a href="qquicktexturefactory-obsolete.html">废弃的成员</a></li>
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<h2 id="public-functions">公用函数</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qquicktexturefactory.html#QQuickTextureFactory">QQuickTextureFactory</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qquicktexturefactory.html#dtor.QQuickTextureFactory">~QQuickTextureFactory</a></b>() override</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QSGTexture *</td><td class="memItemRight bottomAlign"><b><a href="qquicktexturefactory.html#createTexture">createTexture</a></b>(QQuickWindow *<i>window</i>) const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QImage </td><td class="memItemRight bottomAlign"><b><a href="qquicktexturefactory.html#image">image</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qquicktexturefactory.html#textureByteCount">textureByteCount</a></b>() const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QSize </td><td class="memItemRight bottomAlign"><b><a href="qquicktexturefactory.html#textureSize">textureSize</a></b>() const = 0</td></tr>
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<li class="fn">31 个公用函数继承自<a href="../qtcore/qobject.html#public-functions">QObject</a></li>
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<h2 id="static-public-members">静态公用成员</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> const QMetaObject </td><td class="memItemRight bottomAlign"><b><a href="qquicktexturefactory.html#staticMetaObject-var">staticMetaObject</a></b></td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QQuickTextureFactory *</td><td class="memItemRight bottomAlign"><b><a href="qquicktexturefactory.html#textureFactoryForImage">textureFactoryForImage</a></b>(const QImage &amp;<i>image</i>)</td></tr>
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<li class="fn">9 个静态公用成员继承自<a href="../qtcore/qobject.html#static-public-members">QObject</a></li>
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<h3>额外的继承成员</h3>
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<li class="fn">1 个属性继承自<a href="../qtcore/qobject.html#properties">QObject</a></li>
<li class="fn">1 个公用槽函数继承自<a href="../qtcore/qobject.html#public-slots">QObject</a></li>
<li class="fn">2 个信号继承自<a href="../qtcore/qobject.html#signals">QObject</a></li>
<li class="fn">9 个保护函数继承自<a href="../qtcore/qobject.html#protected-functions">QObject</a></li>
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<h2 id="details">详细信息</h2>
<p>The <a href="qquicktexturefactory.html">QQuickTextureFactory</a> class provides an interface for loading custom textures from QML.</p>
<p>The purpose of the texture factory is to provide a placeholder for a image data that can be converted into an OpenGL texture.</p>
<p>Creating a texture directly is not possible as there is rarely an OpenGL context available in the thread that is responsible for loading the image data.</p>
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<h2>成员函数文档</h2>
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<h3 class="fn" id="QQuickTextureFactory"><a name="QQuickTextureFactory"></a>QQuickTextureFactory::<span class="name">QQuickTextureFactory</span>()</h3>
<p>Constructs a texture factory. Since <a href="qquicktexturefactory.html">QQuickTextureFactory</a> is abstract, it cannot be instantiated directly.</p>
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<h3 class="fn" id="dtor.QQuickTextureFactory"><a name="dtor.QQuickTextureFactory"></a><code>[override virtual] </code>QQuickTextureFactory::<span class="name">~QQuickTextureFactory</span>()</h3>
<p>Destroys the texture factory.</p>
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<h3 class="fn" id="createTexture"><a name="createTexture"></a><code>[pure virtual] </code><span class="type"><a href="qsgtexture.html">QSGTexture</a></span> *QQuickTextureFactory::<span class="name">createTexture</span>(<span class="type"><a href="qquickwindow.html">QQuickWindow</a></span> *<i>window</i>) const</h3>
<p>This function is called on the scene graph rendering thread to create a <a href="qsgtexture.html">QSGTexture</a> instance from the factory. <i>window</i> provides the context which this texture is created in.</p>
<p>QML will internally cache the returned texture as needed. Each call to this function should return a unique instance.</p>
<p>The OpenGL context used for rendering is bound when this function is called.</p>
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<h3 class="fn" id="image"><a name="image"></a><code>[virtual] </code><span class="type"><a href="../qtgui/qimage.html">QImage</a></span> QQuickTextureFactory::<span class="name">image</span>() const</h3>
<p>Returns an image version of this texture.</p>
<p>The lifespan of the returned image is unknown, so the implementation should return a self contained <a href="../qtgui/qimage.html">QImage</a>, not make use of the <a href="../qtgui/qimage.html">QImage</a>(uchar *, ..&#x2e;) constructor.</p>
<p>This function is not commonly used and is expected to be slow.</p>
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<h3 class="fn" id="textureByteCount"><a name="textureByteCount"></a><code>[pure virtual] </code><span class="type">int</span> QQuickTextureFactory::<span class="name">textureByteCount</span>() const</h3>
<p>Returns the number of bytes of memory the texture consumes.</p>
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<h3 class="fn" id="textureFactoryForImage"><a name="textureFactoryForImage"></a><code>[static] </code><span class="type"><a href="qquicktexturefactory.html#QQuickTextureFactory">QQuickTextureFactory</a></span> *QQuickTextureFactory::<span class="name">textureFactoryForImage</span>(const <span class="type"><a href="../qtgui/qimage.html">QImage</a></span> &amp;<i>image</i>)</h3>
<p>Returns a <a href="qquicktexturefactory.html">QQuickTextureFactory</a> holding the given <i>image</i>.</p>
<p>This is typically used as a helper in <a href="qquickimageresponse.html#textureFactory">QQuickImageResponse::textureFactory</a>.</p>
<p>该函数于Qt 5.6中引入。</p>
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<h3 class="fn" id="textureSize"><a name="textureSize"></a><code>[pure virtual] </code><span class="type"><a href="../qtcore/qsize.html">QSize</a></span> QQuickTextureFactory::<span class="name">textureSize</span>() const</h3>
<p>Returns the size of the texture. This function will be called from arbitrary threads and should not rely on an OpenGL context bound.</p>
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